Work clamp for woodworking machines



- C. G. WILDERSON WORK'- CLAMP FOR WOODVIORKING MACHINES Filed May 29'1924 '2 Sheets-Sheet 1 INVENTOR Nov. l0l 1925- INVENToR 2 Sheets-Sheet 2I I I I I I I I I Fned My 29.

C G -WILDERSON WORK CLAMP FOR WOQDWORKING MACHINES by a filler plate 41slidably mounted in a I shown in Figure-V3, the lever 27 is depressedand the clamping foot moved into engagement with the work andlpositively held in such position. lVhen the cam portion is turned into aposition to bring its flat surface 33'parallel to the upper side of thelever 27, the spring 24 is permitted to raise the clamping foot out ofengagement with t-he work. It will be apparent that the adjustablecollar 22 enables the position of the clamping -foot to be adjusted inaccordance with the thickness ofthe work to be clamped, whereby the camv will exert the proper clamping pressure thereon. When either of thebushings 25 is removed from its open` ing, the shaftI 29 and itscainpoition 30 can be removed from the arm 6 through such opening. Y u

Integral with the lower end portion of the hub portion 7 of the arm 6 isa horizontal sleeve 34. VThis sleeve receives a bar 3,5, `which may beof Wood or any other suitable material, having a series of spaced holes36 therein. The sleeve 34 carries a pin 37 adapted to engage in any oneofsaid holes and thereby hold the bar inl adjusted position. This barvis adapted to abutat one end against a side of the work WV.

A. work guide is mounted upon the end i portion of the base oppositethat which carvries the ypost 4. This work guide is in the form of aplate 38 having a vertical flange 39 at one redge thereof for'engagement with the side of the work W opposite the side enf gaged bythe end of the bar 35. The plate 38 is pivoted at the longitudinalcenter thereof upon a pin 40. Thispin is carried slot 42 extending fromthe end of the base longitudinally7 thereof. The pin projects upwardlyfrom the filler plate into a recess 43 in the under side of the plate 38adjacent the flange 39. The base has a longitudinal slot 44thereinbeneath the filler plate and in line with thepivot pin 40. A bolt45 extends vertically through this slot, through lthe filler plate andthrough an arcuate slot y 46 in the plate 38, the said arcuate slot having itsfcenter coincident with the center of the -plvot piny 40. Thelowerend of the `bolt 45 has ahead 47 engaging the under side of thebase, and the upper end ofthe t j bolt is screw threaded and' hasmounted j as an axis.

thereon a wing nut 48, whereby the guide plate 38l may be clamped in anydesired angular position, the plate being adapted toghe swung aboutthecenter of the pivot pin 4() It will also be seen that the guide plate38. may be shifted bodily longitudinally of the table by loosening thewing nut and shiftingthe filler plate 41 in the slot 42, thelongitudinal movement of the filler plate benglimited onlyA by thelength of the slot 44 Obviously this slot maybe unade anydesired'length.

In using this work clamp, the collar 22 will be adjusted on the stem 17into a position such that when the fiat side 33 of the cam 30 isparallel to the upper surface of the lever 27, the coil spring 24 willelevate the clamping foot 19 to a position slightly above the` uppersurface ofthe piece of work to be clamped. The arm 6 is adapted to beswung about the post 4 into any desired angular position to suit theangle at whiohit is 'desired that vthe work be positioned on the base.When'the arm 6 is swung into such angular osition thebar v b C 7 35moves with it, so that when the arm 6 is adjusted into the desiredpositiomthe bar y35 maybe adjusted so as to engage the side of the work.lThe guide plate 38 may then be adjusted vinto the desired angularposition vpreferred embodiment of my invention, it

will be understood that changes fnay be made in the detailsofconstruotion without departing from the spirit of 'the invention orscope of the appended claims.

I claim:

1. A work clamp, comprising a support, a vertical stem slidably mountedin said support, a clamping foot carried by the lower end of said stem,a coil spring surrounding said stem and engaging at itslower end a fixedportion of the support and atits upper end a collar adjustably mountedonfsaid stem, and means engageable with said collar for moving said footto and positively holding it in clamping engagement with `the work,substantially as described. i

2. A. work'elamp, comprising an arm a1.'- ranged to overlie the work tobe clamped, a vertical stem slidably mounted in said arm. a clamp-ingfoot carried by the lower end of said stem, a coil spring surroundingsaid stem and engaging a fixed .support on 'the arm at-its lower end andat its upper end a collar adjustably mounted on said stem, a leverpivoted to said arm and enga-ging the upper side of said collar, a camjournaled in said arm and engaging the upper side of said leverformoving said foot to and holding it in'clamping engagement with thework, and means 4Afor operating said cam, substantially as 'described 3;"AQ-i work clamp, comprising a hollow arm .arranged tov overlie the workto be d, vertical stem slidably mounted gianni, a clamping foot Qarriedby the;

lll)

"insegue erating said cam portion, substantially as described.

et. A work clamp, con'ipi'ising a hollow arm arranged to overlie theworl: to be clamped, a vertical stem slidably mounted inV said arm, aclamping footY carried by the lower end of said stem, a coil springsurrounding said stem and engaging a fixed support on the arm at itslower end and at its upper end a collar adjustably mounted on said stem,a lever pivoted on said arm and having a bifurcated end straddling saidstem and engaging the upper side of said collar,` bushings removablymounted in aligned openings in the sides oi"- said arm, a shaft ouinaledin said bushings and having a cam portion engaging the upper side ofsaid lever for moving said clamping foot to and holding it in clampingengagement with the work, said shaft and itscam portion being removablethrough one of said openings, and means for operating said cam portion,substantially as described.

A work clamp, comprising a. base, an arm arranged vto overlie the workto be clamped and mounted for swinging movement about a vertical axis,said axis being` shiit'table longitudinally of the base to enable bodilyadjustment of the arm, va clamp device mounted in said arm for verticalmovement, yielding means tending to elevate said clamp device, and means`for moving said device. to and holding it in clamping engagement withthe work, substantially as described.

6. A Work clamp, comprising an arm arrangedto overlie the work to beclamped and mounted for swinging movement about avertical axis, meansfor limiting the swinging movement of said arm about said axis, saidmeans being adjustable to a position to permit unlimited swingingmovement of said arm about said axis, a cla-mp device mounted in saidarm for verticalmovement, lvielding means tending to elevate said clampdevice, and Ameans for moving said device to and holding itin clampingengagement -ivith the work, substantially as described.

'7. A work clamp, comprising a base, a vertical post mounted upon saidbase for bodily adjustment longitudinally thereof, means for holdingsaid post in adjusted po- `sition, an arm arranged to overlie the workab i idA clamping engagement with the work, sub

stantially as described.

8. A work clamp, comprising a base hav- ,mams aan-.

ing an inverted T slotk extending longitudi'- nally thereof, a hollowpost mounted on said base and having meansprojecting from its lower endinto the narrow vportion of said slot for preventing rotation of saidpost While permitting adjustmentthereof longitudinally of said base,ranarm arranged to overlie the work to be clamped andl having a hub portionjournaled on.v said post and through which the latter extends, a boltextending-'through said post and having a head on its lower endpositioned in the wide portion o'l' said slot, said head engaging thesides of said slot to prevent turning of the bolt, removable meansmounted on the upper end of said bolt and engaging the'upper end of saidpost and 'overlyingthe upper end of said hub portion to prevent removalof the post and arm while permitting the arm to swing freely on saidpost, and work cla-mpingv means carried by said arm, .substantiallyV asdescribed.,r

9. A workclamp, comprising abase hav- ,y ing anv inverted'T slotextending longitudi- Y nally thereof, a hollow post mounted on said baseand having means projecting from its lower end into the narrow portionof said slot for preventing' rotation of said post While permittingadjustment thereof longitudinally of said base, an arm arranged tooverlie the work to be clamped and having a hub portion journaled onsaid post, a bolt extending through said post and having a head on itslower end positioned in the wide portion of said slot, said headengaging the sidesl of said slot to prevent turning of the bolt, a nutmounted on the upper end of said sa f iiov

bolt, a washer interposed between said nut] and the upper end of saidhub portion, .and Work Vclamping means carried by said arm,substantially as described. i Y

10. A Work clamp, coinprisinga base, a vertical post mounted on saidbase and having a horizontal slot therein, `an arm arranged to overliethe Work to be clamped and having a hub portion journaled on said post,a pin adjustably mounted in vsaid hub portion and having its inner end'Anormally positioned in said slotv to limitfswingingn movements of saidarm, and worlgjcl'ampin'g means carried by said arm, substantially asdescribed. f v 1-1. A Work clamp, comprising ,.a base,a

horizontally extending arm arranged to overliethegwork to be clamped andhaving Cil fg. Y 1,560,748

a hub portion` at lone end thereof joul'naled lany of said openings,said bal' being adapted upon a vertical support carried bythe base, toyabut at one end against thel Work to be a horizontalV guide carried bysaid hubl porclamped, and Work clamping means carried l0 tionY adjacentsaid base, a bar mounted to by said arm, Substantially as described.

slide in Said guide vand having a, series of In testimony whereof I havehereunto set spaced openngstheren, a pin mounted in my hand. y saidguide and adapted to be positioned in CLINTON G. IVILDERSOIXT.I

